Machine for blowing glass.



No. 635,393. I Patented Oct. 24, I899. c H. w. une. MACHINE FOB BLOWING GLASS.

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NITED STATES ATENT FFIC.

MACHINE FOR BLOWING GLASS.

SPECIFICATION forming part of Letters Patent N 0. 635,393, dated October 24, 1899- Application filed March 9, 1899.

T aZZ whom it may concern:

Be it known that I, CHARLES H. W. RUHE, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented or discovered certain new and useful Improvements in'Ma chines for Blowing Glass, of which improvements the following is a specification;

The invention described herein relates to certain improvements in machines for blowing glass, and has for its object a construction of mechanism whereby the movements of the mold-sections and the blowing-head are controlled by fluid-pressure, which in turn is controlled by an electrically-controlled valve mechanism.

In general terms the invention consists in the construction and combination substantially as hereinafter more fully described and claimed.

In the accompanying drawings, forming a part of this specification, Figure 1 is a side elevation of my improved machine. Fig. 2 is a View, partly in front elevation and partly in section, of the construction shown in Fig. 1. Fig. 3 is a front elevation of a modification of the construction shown in Figs. 1 and 2. Fig. 4 is a sectional elevation of the construction shown in Fig. 3. Fig. 5 is a sectional detail view, on an enlarged scale, of the valve mechanism in the blowing-head controlling the flow of fluid-pressure to the blowpipe; and Fig. 6 is a view similar to Fig. 4, illustrating a further modification of the machine.

In the practice of my invention pillowblocks 1 are secured in any suitable manner to the bottom of a tank 2, which is preferably mounted upon wheels (not shown) to facilitate the movement of the mechanism from place to place. One of the pillow-blocks is preferably provided with a socket for the reception of the post or standard 3, on which are adjustably secured the forked arms 4 for supporting the blowpipe in the operation of the machine.

On the upper end of the standard 3 is mounted a sleeve 5, adapted to be moved up and down on the post or standard by mechanism to be hereinafter described. A socket 6 is secured to or form ed integral with the sleeve 5, and within the socket is arrangedahollow plug 7, which is held in position vertically Slerial No. 708,360. (No model.)

within the socket by means of the screw-cap 8,'fitting on the upper end of the plug and bearing on the upper end of the socket. Within the plug is arranged the cup-shaped valve 9, normally held within its seat in the plug by spring 10 and adapted to be raised against the tension of the spring by the end of the blowpipe 11 sufficiently far to uncover the ports 12, extending radially from the central opening in the valve, permitting the flow of fluid from the hollow plug into the valve. The socket 6 is provided in its inner wall with a groove 13,and radial passages extend from the central passage of the plug, so as to communicate at all times with the groove 13. This groove is connected by a passage 14 to the interior of the sleeve 5, the passage being so located as in certain positions of said sleeve to register with a port 15 through the wall of the reservoir formed in the upper portion of the hollow post or standard 3, said reservoir being connected to a suitable source of supply of fiuid under pressure. A wormwheel 16 is keyed to the tubular plug and intermeshes with a worm-wheel17 on a shaft driven by an electric motor 18, which is socured on a bracket 19, extending from the sleeve 5, so as to move with the latter.

Near the lower portion of the post or standard 3 is secured an arm or bracket 20, having attached to its outer end or formed integral therewith a fiuidpressure cylinder 21, the flow of fluid-pressure to said cylinder being controlled by an electrically-actuated valve mechanism 22 of any suitable form or construction, but preferably of the type shown and described in Letters Patent No. 358,519, granted March 1, 1887, to George Westinghouse, J r. The piston-rod 23 has a flexible connection to one end of a lever 24, which is mounted on a movable fulcrum consisting of a bar 25, which is pivotally mounted on a suitable bearing secured to the bottom of the tank 2. The opposite end of the lever 24 is connected to trunnions on the sides of a sleeve 26, movably mounted upon the post or standard 3. This sleeve is connected by rods 27 to the sleeve 5 and is provided near its lower end with ears 28, between which the arms 29 are loosely pivoted, said arms being preferably bowed or so constructed as to have a certain amount of resiliency. The opposite ends of these arms are connected to pins projecting laterally from rocker-arms and 31. The arm 30 is keyed on or otherwise secured to a sleeve 32, mounted in one of the pillow-blocks 1, and the arm 31 is keyed to a shaft 33, passing loosely through the sleeve 32 and having its opposite end mounted in the other pillow-block. As shown in Fig. 2, the arms 30 and 31 are so secured to the respective shaft and sleeve as to project in opposite directions. Leaves or plates 35 35 provided with sleeves 36, are secured on the sleeve and shaft 32 and 33, respectively, in such manner that when the arms are raised by the operation of the piston in the fluidpressure cylinder these leaves or plates 35 35 will be moved apart, so as to separate the mold-sections 36 36. The bottom of the matrix of these mold-sections is formed by a plate or disk 37, detachably secured to a swinging arm 38, loosely mounted on the shaft between the sleeves on the plates or leaves. As shown in Figs. 1 and 2, this arm extends below its pivotal support and is so weighted as to bring the bottom of the mold into proper position, while permitting it to be shifted, so as to accommodate itself to the mold-sections when being closed.

In the construction shown in Figs. 3 and L the lower portion of the post or standard 3 is utilized as a fluid-pressure cylinder 21 and within this cylinder is located the piston. The flow of fluid-pressure to and from the lower end of this cylinder is regulated by electrically-controlled valve mechanism 2", as in the construction shown in Figs. 1 and 2. The piston-rod 23 is connected to a rod 23, extending up within the post or standard. A cross-head 39 is secured to this rod, and the ends thereof project through slots in the post or standard. To the outer ends of this crosshead are attached the rods 29, which have their lower ends connected to the arms 30 and 31 for shifting the mold-sections. A crosshead 40 is secured to the upper end of the rod 23 and has its ends, which project through slots in the post or standard, connected to the movable sleeve 5.

It will be observed that the several parts of the machine are so constructed and arranged that the weight of the sleeve 5 and the parts carried thereby is utilized for the purpose of closing the mold-sections and lowering the blowing-head into engagement with the upper end of the blowpipe. In order to open the mold-sections and to raise the sleeve 5 with the blowing-head, fluid-pressure is admitted into the cylinder by the operation of a switch in the circuit of the electromagnet of the electrically actuated valve mechanism. The downward movement of the sleeve 5 is controlled by the escape of fluid-pressure from the cylinder. lVhile this construction is preferred, as the parts of the mold are closed and yieldingly held in their closed position by gravity and are not liable to injury, it will be readily understood that the closing movements of the mold-sections and the downward movement of the sleeve 5 can be eifected positively by the admission of fluid-pressure to the cylinders above the piston, such admission being controlled by the electrically-actuated valve mechanism (shown in Fig. 6) and consisting of a second electrically-controlled valve mechanism 22, connected to the upper end of the cylinder 21 and to a suitable source of fluid under pressure.

In order to effect the rotation of the blowpipe and the article within the mold during the blowing operation, jaws l2 project radially through holes in the lower end of the plug 7 into the interior thereof and are yieldingly held in operative position by an elastic band 43. These jaws, which have their inner ends beveled or inclined, are adapted to engage 'notches 44 formed in the outer wall of the blowpipe, as shown in Fig. 5, and thereby lock the blowpipe to the plug. The bottom walls of the notches are so inclined that a slight vertical pull will release the blowpipe, forcing the jaws outwardly.

In order to facilitate the cracking 01f of the completed article from the blowpipe, a rotary disk 45 is mounted on the mold in such position that as the glass is rotated and expanded it will be forced out against the edge of the disk, which will cut.a groove in the blow-over of suchdepth that a slight blow on the blowpipe will detach the article from the blowover.

By the employment of a reservoir of a ca pacity equal to or greater than that of the article to be formed between the air-compressor and the mold a more uniform pressure can be maintained in the mold, such stored pressure compensating for reduction of pressure due to the expansion of the article in the mold.

I claim herein as my invention- 1. In a machine for blowing glass, the combination of pivotally-mounted mold-sections, a vertically-movable blow-head, a fluid-pressure cylinder and piston and connections from the piston to the mold-sections and the blow-head, substantially as set forth.

2. In a machine for blowing glass, the combination of pivotally-mounted mold-sections, a blow-head adapted to engage the blowpipe, means for rotating the blow-head, and a fluidpressure cylinder and piston and connections from the piston to the blow-head and moldsections, substantially as set forth.

3. In a machine for blowing glass, the combination of pivotally-mounted mold-sections, a blow-head adapted to engage the blowpipe, means for imparting a constant rotation to the blow head and pipe, a fluid-pressure cylinder and piston, an electrically-controlled valve mechanism controlling the flow of fluidpressure to the cylinder and connections from the piston to the blow-head and mold-sections, substantially as set forth.

4.. In a glass-blowing machine, the combination of pivotally-mounted mold-sections, a

movable blow-head adapted to engage the blowpipe, the mold-sections being adapted to be closed and the blow-head to be moved down into engagement with the blowpipe by gravity, and a fluid-pressure cylinder having its piston connected to the mold-sections and blow-head and adapted to open the mold-sections and raise the blow-head, substantially as set forth.

5. The combination of two pivotally-mounted mold-sections, a pivotally-mounted support Weighted so as to normally stand in operative position and a disk adapted to form the bottom of the mold detachably mounted on the pivotal support, substantially as set forth.

I 6. In a machine for blowing glass, the combination of a mold, a hollow post or standard adapted to form a storage reservoir or cham- CHARLES W. RUIIE.

WVitnesses:

DARWIN S. WoLooTT, F. E. GAITHER. 

